Supersnelle erbijsommen en erafsommen tot 20
In de mix
|
1.
11 + 9 =
3
20
2
4
|
2.
12 + 1 =
3
2
13
1
|
3.
10 + 10 =
20
2
3
4
|
4.
2 + 3 =
1
3
2
5
|
|
5.
9 – 1 =
2
3
8
1
|
6.
7 – 4 =
1
2
4
3
|
7.
16 + 4 =
2
20
4
3
|
8.
1 + 6 =
7
3
1
2
|
|
9.
7 – 1 =
6
2
3
1
|
10.
12 – 0 =
3
2
12
1
|
11.
16 – 16 =
2
0
3
4
|
12.
20 + 0 =
2
3
4
20
|
|
13.
10 + 0 =
1
3
2
10
|
14.
18 + 0 =
4
18
3
2
|
15.
17 – 0 =
3
2
4
17
|
16.
14 + 3 =
2
17
3
4
|
|
17.
3 – 3 =
0
4
3
2
|
18.
18 + 2 =
4
20
2
3
|
19.
3 + 5 =
8
3
1
2
|
20.
14 + 6 =
20
4
3
2
|